1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settingslib.deviceinfo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Handler;
import android.os.Message;
import com.android.internal.util.ArrayUtils;
import com.android.settingslib.core.AbstractPreferenceController;
import com.android.settingslib.core.lifecycle.Lifecycle;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import com.android.settingslib.core.lifecycle.events.OnStop;
import java.lang.ref.WeakReference;
/**
* Base class for preference controllers which listen to connectivity broadcasts
*/
public abstract class AbstractConnectivityPreferenceController
extends AbstractPreferenceController implements LifecycleObserver, OnStart, OnStop {
private final BroadcastReceiver mConnectivityReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ArrayUtils.contains(getConnectivityIntents(), action)) {
getHandler().sendEmptyMessage(EVENT_UPDATE_CONNECTIVITY);
}
}
};
private static final int EVENT_UPDATE_CONNECTIVITY = 600;
private Handler mHandler;
public AbstractConnectivityPreferenceController(Context context, Lifecycle lifecycle) {
super(context);
if (lifecycle != null) {
lifecycle.addObserver(this);
}
}
@Override
public void onStop() {
mContext.unregisterReceiver(mConnectivityReceiver);
}
@Override
public void onStart() {
final IntentFilter connectivityIntentFilter = new IntentFilter();
final String[] intents = getConnectivityIntents();
for (String intent : intents) {
connectivityIntentFilter.addAction(intent);
}
mContext.registerReceiver(mConnectivityReceiver, connectivityIntentFilter,
android.Manifest.permission.CHANGE_NETWORK_STATE, null);
}
protected abstract String[] getConnectivityIntents();
protected abstract void updateConnectivity();
private Handler getHandler() {
if (mHandler == null) {
mHandler = new ConnectivityEventHandler(this);
}
return mHandler;
}
private static class ConnectivityEventHandler extends Handler {
private WeakReference<AbstractConnectivityPreferenceController> mPreferenceController;
public ConnectivityEventHandler(AbstractConnectivityPreferenceController activity) {
mPreferenceController = new WeakReference<>(activity);
}
@Override
public void handleMessage(Message msg) {
AbstractConnectivityPreferenceController preferenceController
= mPreferenceController.get();
if (preferenceController == null) {
return;
}
switch (msg.what) {
case EVENT_UPDATE_CONNECTIVITY:
preferenceController.updateConnectivity();
break;
default:
throw new IllegalStateException("Unknown message " + msg.what);
}
}
}
}
|
